I am also a fan of field coil drivers. I've heard a number of Western Electric cone and compression field coil drivers, G.I.P. Laboratory clones of Western Electric field coil drivers and an outrageous improved version of the Western Electric 597 compression tweeter (the G.I.P. souped up version costs something like $60k a pair), Classic Audio speakers with field coil drivers, Voxativ drivers, Lowther field coil full range drivers, Supravox woofers, Goodman woofers, Feastrix full range drivers, and a couple of other full range drivers that I don't know who made them. I particularly like both the orginal and clones of Western Electric 597 tweeters and the 555 midrange compression driver. I also love the Goodman field coil woofer. But, what I really would love to have the most is the Jensen/ERPI M10 fullrange driver (13" driver) with a 597 tweeter on top--that is sort of my dream system.
Also, while I do like quite a few field coil drivers, I also like many competing permanent magnet drivers. I think that the permanent magnet version of the Western Electric 555 compression driver is at least as good (but a whole lot rarer and more expensive) and my very favorite midrange compression driver is the Western Electric 713b, which is a permanent magnet driver.